A Repeat-Breeding Murrah Buffalo on a Straw-Based Ration
Kamla owns two Murrah buffaloes in Alwar district. The younger buffalo calved 70 days ago, gives 6 L of milk a day and has a body condition score of 2.5 on a 5-point scale. She has shown weak heat at 25-day intervals and did not conceive after two artificial inseminations. The veterinarian found no uterine infection. Kamla feeds about 14 kg of wheat straw, 3 kg of cottonseed cake and 2 kg of wheat bran per day, with no green fodder and no mineral mixture. Water is offered twice daily. The elder buffalo gives 9 L. Kamla wants to add 2 kg of concentrate and start oxytocin injections to improve milk let-down and conception. Her neighbour advises her to sell the younger buffalo because it is a repeat breeder.
1. Assess the ration. What are the main nutritional constraints for a 6 L buffalo, and what changes would you make without a large increase in cost?
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The ration is bulky but unbalanced. About 14 kg of wheat straw supplies little energy and very little bypass protein; it is mainly a maintenance feed. The 3 kg of cottonseed cake supplies protein but is not a complete concentrate, and high cottonseed cake intake can also bring gossypol and reduce palatability. Wheat bran is useful for bulk but is not a major energy source. There is no green fodder, so carotene and some minerals are low, and there is no mineral mixture. For a 6 L buffalo, the concentrate should be about 4-5 kg per day, built from energy and protein sources, not just cake and bran. A practical low-cost change is: keep about 10-12 kg wheat straw, add 20-25 kg green fodder such as berseem or lucerne when available, add 1-1.5 kg maize or barley, keep cottonseed cake at about 2 kg, add 1 kg wheat bran, and give 50 g mineral mixture plus 30 g salt daily. Introduce the concentrate over 7-10 days to avoid acidosis. This is cheaper than adding 2 kg of an unknown concentrate.
2. Why might she be failing to conceive, and what management and reproductive steps should be taken before culling?
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The buffalo is not necessarily a true repeat breeder yet. She calved only 70 days ago and has a body condition score of 2.5, which suggests she is still recovering from the energy demand of early lactation. Weak heats at 25-day intervals may be true short cycles, but they may also be heat detection failures; observing only once a day can easily miss a buffalo in the evening or early morning. Low energy, low mineral intake and negative energy balance can delay ovulation and reduce conception. The veterinarian ruled out uterine infection, but not all causes are covered. Before culling, improve the ration as above, bring body condition toward 3.0, observe heat twice daily with a teaser bull or a chin-ball marker, and record dates. Check for brucellosis and other herd-level causes if abortions or repeat returns occur. Give her two to three well-detected cycles after the nutritional correction. Culling a 6 L buffalo at 70 days postpartum is premature.
3. Comment on the proposal to use oxytocin and to add 2 kg concentrate suddenly.
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Oxytocin should not be used to improve milk let-down. It is a veterinary drug, its misuse in dairy animals is illegal and can harm the buffalo, and it does not solve the underlying management problem. Milk let-down is a conditioned reflex: allow the calf to suckle or be near the buffalo, wash the udder with warm water, massage it, keep the milking area quiet and milk at a regular time. These steps are free and safer. Adding 2 kg of concentrate suddenly is also risky. A sudden increase in readily fermentable feed can cause rumen acidosis, drop milk fat, reduce feed intake and worsen the transition period. Increase concentrate by about 250-500 g every few days, mix it with the roughage, and watch dung consistency and cud chewing. The priority is a balanced ration and better heat detection, not oxytocin or a sudden concentrate jump. Selling the buffalo should be the last option, after two to three corrected cycles.