Hi Guys, thank you once again. Yesterday we both took them to the Vet to make sure that they are OK because for some reason she had no fleas but we were still scratching but according to the Vet, they should take some pills and everything will be back to normal. Thank God, Lisa is peeing on her own and using the cat litter with no problem at all. I was really happy because for a 5 week year old kitten, she is very intelligent. Unfortunately, the food is still my major problem. You won´t believe this, Lisa is taking Whiskas and Gary was taking his usual adult food (forgot its name) and he is not eating at all if I don´t give him Whiskas. What shall I do? I worry when he doesn´t eat and I know he´s not sick because when I tried to mix Whiskas with his normal food, he just ate the Whiskas and left the other one, its unbelievable!!! I don´t know whether he´s jealous or not but I treat them the same..no preferences at all although its my first time dealing with 2 cats. Another question, how is the best way to feed cats? I mean, should I remove their plate after they eat or shall I leave it there? And how many times should they eat per day? Thanks alot guys, I appreciate your help 
Lisa is doing fine and I can assure you that she has a very caring brother
The food is the only problem :/