Hi. I have two dogs and will often open a can and give each one 1/4 on top of their dry food for two days. It keeps fine in the fridge for that long. I wouldn't keep it longer than two days. Finish it on the third day. I have no scientific proof but my big dog has a very sensitive stomach and this method seems to work. Also, I am very mindful about how much I give her at one time because her stomach is so sensitive and the food is very rich. She is prone to diarreah if she eats too much nutrient dense other than kibble or people food. Hope this helps!