im looking for a decently sized dog. 60-115 lbs. since i have 2 cats it needs to be good with them. i want it to be freidnly to strangers. and NATURALY not dog agressive. the dog agressive thing really isnt a big issue because i work at a dog kennel and will socialize it at puppy hood. i want a high strung dog that i can wrestle with and will play with me. i was thinking of a black lab and golden retriever but everyone i know has gotten so fat. im maybe thinking about a white german shepard but i hear they have alot of health problems.. what do you guys suggest?