A water fountain often encourages drinking.
If it were my cats? I would try a good quality grain free canned and get rid of the Purina One altogether(or better yet, look into raw feeding). Dry (and especially Purina) really isn't very good for kitty. I know if mine missed a meal or two they'd be WAY more open to eating something they preferred not too.
*I would take up the dry and get rid of it. I wouldn't even have it in the house for them to smell. I'd put their canned food down and give them 15-20 minutes. If they didn't eat it, I would pick it up and put it in the fridge and try again (heated up a bit) at their next meal. Rinse and repeat.
*Keep in mind my guys are healthy. If your cat is very overweight or has health issues it isn't a good idea to let them go for long periods without food.
If it were my cats? I would try a good quality grain free canned and get rid of the Purina One altogether(or better yet, look into raw feeding). Dry (and especially Purina) really isn't very good for kitty. I know if mine missed a meal or two they'd be WAY more open to eating something they preferred not too.
*I would take up the dry and get rid of it. I wouldn't even have it in the house for them to smell. I'd put their canned food down and give them 15-20 minutes. If they didn't eat it, I would pick it up and put it in the fridge and try again (heated up a bit) at their next meal. Rinse and repeat.
*Keep in mind my guys are healthy. If your cat is very overweight or has health issues it isn't a good idea to let them go for long periods without food.