Keep the animals eating
the sows should have an optimized body condition before farrowing, and we have to help them maintain their condition. Fat sows are more likely to get hot and not eat;
record the body condition (visual score, back fat, caliper) regularly and adjust the sow feeding norms accordingly;
when it is too hot, it is not easy to keep the animals eating. So it can be necessary to review the time of feeding (start earlier/finish later in order to feed during the coolest parts of the day) and the frequency of feeding (feed less but more frequently);
it is primordial to have first parity sows to eat properly, if they do not eat well, they might have trouble to express estrus after weaning;
Optimize the reproduction conditions
the heat check procedures have to start as early as possible in the morning, with insemination following without delays;
it is essential to spend the required amount of time to proceed to a correct boar exposure for the gilts and the weaned sows as it has a proven positive influence on follicular development. For each group of 5-6 sows or gilts, there should be a minimum of 5 minutes of quality boar exposure. Make sure that the boars are active and producing a strong smell, this will help to stimulate the follicular growth;
it can be considered to inseminate sows immediately at first standing reflex, as the estrus-ovulation pattern can be shortened in the summertime;
the fridge for semen storage should be preventively maintained in order to make sure it provides perfect storage temperature. Install min-max thermometer in the fridge to make sure that the temperature fluctuations are reduced to a minimum. Exposition to the wrong temperature will alter the motility and shelf life of the semen;
when going to inseminate, take only a minimum required quantity of semen doses and keep them in a cooling box;
finally, if the layout of the farm allows it, it can be advised to adjust the replacement policy of your farm to have some 10-15% extra gilts available for insemination during the summer period.
Those different steps can help your pig farm go through the summer period with minimum negative impact on the sow herd productivity.
the nutrient profile of the feed can also be reviewed (optimized amino acid profile with less crude protein, more energy in the feed, less raw fiber content). In order to keep the benefit of structural fiber (peristalsis, satiety), innovative non digestible fiber sources can be used during this period.