i have 5 p's about 4-5 inches long that aren't very aggresive, and i was going to buy another one thats twice the size and thickness and quite aggressive. if i put him in with my 5 will there be problems? , anyone with personal experience, i'de love to hear stories, oh and my 5 and the one big one are all normal red belly p's, identically the same, so im not mixing breeds. thanks