Animal Nutrition & Health
Early feed and water intake can help protect gut function, reduce post-weaning lag and support more efficient nursery performance.
Weaning is one of the most challenging phases in swine production. At three to four weeks of age, piglets transition abruptly from sow milk to dry feed while their digestive, immune and gastrointestinal systems are still developing. Combined with changes in housing and social grouping, this can reduce feed intake, compromise gut health and increase the risk of post-weaning diarrhea. In hot and humid climates, these challenges are often amplified. Because poor feed intake during the first week after weaning can have lasting effects on growth performance, the priority is to help piglets start eating as quickly as possible.
The first 24 to 48 hours are especially important. Only around half of weaned pigs consume dry feed within the first 24 hours, rising to about 60% within 48 hours. During this period, piglets may lose 100 to 250 g of body weight on the first day and need three to seven days to recover their weaning weight. Restoring pre-weaning energy intake can take eight to 14 days.
Reduced intake affects the structure and function of the small intestine. Lower nutrient flow can be accompanied by shorter villi, changes in crypt depth and reduced digestive capacity. This limits nutrient absorption and leaves more substrate available for fermentation in the lower gut.
The gut barrier is central to this response. When intestinal permeability increases, bacteria and incompletely digested nutrients can cross the epithelial barrier and trigger inflammation. Enterotoxigenic E. coli may then adhere to intestinal cells and produce toxins that drive water and electrolyte loss, contributing to post-weaning diarrhea. At farm level, the consequences can include reduced feed intake, weight loss, poor feed efficiency and uneven groups.
Low intake can set off a chain of digestive and microbial challenges after weaning.
When intake falls, the consequences extend beyond slower growth. Low nutrient supply can contribute to villus atrophy, lower digestive enzyme secretion and reduced nutrient absorption. More undigested nutrients then reach the large intestine, where they can fuel undesirable fermentation and the production of metabolites such as ammonia and biogenic amines. The result can be dysbiosis, intestinal inflammation and a higher risk of diarrhea.
High-palatable creep feed during late lactation helps familiarize piglets with dry feed and supports the development of digestive enzyme activity. It also narrows the sensory gap between milk and the nursery diet.
Creep feeding is particularly relevant in large litters, where competition for milk and variation in weaning weight can be greater. Beyond providing nutrients, early exposure helps piglets practice eating, supports maturation of the gut microbiome and familiarizes them with the sensory and physical characteristics of solid feed. Liquid or gruel-type creep feed may help some young or light piglets make the transition, but hygiene and freshness remain essential.
Water intake supports solid feed intake. Unrestricted access to cool, clean water, with appropriate flow, encourages piglets to drink and can help them begin eating dry feed sooner.
Make the drinker easy to discover and operate. Open cups or bowls can shorten discovery time compared with less visible systems, while drinker height, angle and surrounding space influence access and waste. Water pressure and flow should be checked rather than assumed: delivery that is too low can restrict intake, while excessive flow can increase waste and humidity. Water lines also require routine cleaning to control biofilm.
An intake of more than 250 g per day during the first week supports a stronger post-weaning start and can help pigs reach target slaughter weight up to 10 days earlier.
Monitor more than average daily feed disappearance. Pay attention to the proportion of pigs that have started eating, variation in belly fill, weight change, fecal consistency and the number of fallback pigs. Early identification allows small or slow-starting piglets to be moved to a warm, draft-free recovery area where mat feeding, gruel feeding or other additional support can be applied.
For the first days, management should focus on frequent observation. Fall-behind pigs are easier and less costly to support when identified early. A practical check includes room temperature and drafts, feeder coverage, water delivery, belly fill, fecal consistency and the location and behavior of smaller pigs.
Feeder adjustment also matters. A clean feeder should provide visible, accessible feed without encouraging excessive waste. Because newly weaned pigs are accustomed to eating together, sufficient feeder space can reduce competition and help more piglets begin eating promptly. Pen and floor space should support comfortable movement between resting, feeding and drinking areas.
Nutrition cannot compensate for a nursery that is cold, wet, dirty or difficult to navigate. Before pigs arrive, rooms should be thoroughly cleaned, sanitized, dried and warmed. Unintended drafts should be corrected, and pig behavior should be used alongside temperature settings to determine whether the environment is comfortable. Within the thermal comfort zone, pigs are better positioned to eat, convert feed efficiently and maintain immune defense.
Phytogenic feed additives, or PFAs, are standardized blends of plant extracts, essential oils and herbs. Used in nursery diets, they provide several complementary modes of action that can support intake and gut function during the post-weaning transition.
Phytogenics should be viewed as one component of an integrated program rather than a substitute for feed formulation, hygiene or water management. Their value lies in combining sensory, digestive and microbial effects that address several consequences of low intake at the same time.
Sensory compounds can make a diet easier to accept when ingredients or processing create unfamiliar odors and tastes. Plant-derived compounds may also stimulate endogenous digestive enzymes, helping young animals make better use of protein, amino acids and starch. Other active constituents can help shape the microbial environment by limiting undesirable proliferation and reducing competition for nutrients.
Mode of action | What it can support |
Sensory enhancement | Plant-derived flavor compounds can mask less palatable ingredients and support voluntary intake. Sweet, fruity and milky profiles align with piglets’ sensory preferences. |
Digestive support | Phytogenic compounds can stimulate endogenous enzymes such as amylase, pepsin and trypsin, supporting the breakdown and absorption of protein and amino acids. |
Microbial balance | Active constituents can help limit undesirable microbial proliferation, reducing competition for nutrients and harmful metabolite production. |
First nursery diets should provide highly digestible protein, energy, vitamins and minerals that young piglets can efficiently utilize. Ingredient quality, palatability and feed form are critical to support intake. While excessive fiber can dilute nutrients, specific fiber fractions may support gut development and post-weaning resilience. Plant-based ingredients can also contain antinutritional factors, making feed enzymes such as phytase, xylanase and protease valuable tools to improve nutrient utilization and reduce undigested substrate in the lower gut. Diet acidification can further help support gastrointestinal conditions and control undesirable bacteria.
Trials in weaned piglets using PFA supplementation at 300 g per tonne reported improvements in ileal nutrient digestibility and overall performance. Complementary research at the Centre of Animal Nutrition in Mank, Austria, reported body-weight gains of more than 6.5% together with improved nursery feed conversion ratio.
Interpreting trial results requires attention to starting weight, health status, diet composition, environmental challenge and the duration of supplementation. The most useful farm evaluation therefore combines biological outcomes, such as feed intake, growth, feed conversion and fecal consistency, with the economics of the complete nursery program.
A strong nursery start begins with early intake. Combining practical feed and water management with targeted phytogenic support can help protect gut function, reduce post-weaning lag and support more efficient lifetime performance.
29 September 2026
