Nothing. I can't remember the exact quote right now, but I believe one of ThunderClan's medicine cats once said something the the effect of: "I can heal her body but not her mind." If necessary they can give poppy seeds to calm cats down, but there is no cure for depression.
Depression can be a diases or you can just be depressed for a bit. If he has been depressed for that long you should take him to a doctor. They might give him some medicne to help his depression.
you have to surf to cianwood
surf to cianwood city and talk to the pharmacisthe will give you the medicine
The reasons that your cats HELP with your depression, is because they are someone who is there for you, probably constantly too. Depressed people tend to need or want somebody or something to be there for them, to make them happy. In this case, your cats make you happy because they give you company, probably like a best friend to you. It doesn't CURE your depression though. If you are seeing that you are having a hard time with that, you need to go to your doctor and talk to him/her about it.
cats
Ate cats
by buying medicne
It's spelled "medicine".
can dogs give cats lice
go to ciedriewood city and go in to the pharmacy and talk to the guy there and he will give it to you and also get the shuckle and beat the gym then go back to the light house
Eugenia caryophylus
they ate medicne