Best dry food for putting on weight

[christypooh402]

So, I'm fostering this stray that a lady picked up last week and the lady that runs the rescue is telling me that I should get food high in crude fat. I don't have a problem with price, because she is going to reimburse the food cost through the rescue. He goes to the vet on Tuesday, so until then he is completely separated from my cat. For now, he's eating the same thing Tonks is eating, but it's a low card food cuz she's a chubby one.
So, I need to know what to get for him that will fatten him up, he's a scrawny one. Advice would be much appreciated!

[laurief]

If, for some reason, you must feed him kibble instead of a high quality canned food, I recommend Innova EVO. EVO is very calorie-dense (high fat and protein). Actually, I would also recommend EVO if you feed canned. Both EVO kibble and EVO canned are calorie-dense, high quality foods.

Laurie