I'd say adopt a greyhound. We love our girl. She is agile around the house when she gets rambunctious, but she's a big couch potato. She loves to play, but only for a short time then it's back to the napping behind the chair. She minds pretty well and is spoiled rotten. There are several greyhound rescues in the state that will work with you to find a dog to adopt that is right for your family situation. Many are good with kids/cats/small dogs many are not. You just got to find the right one. Ours sheds some, but we use the shed ender after her baths and it is fine. It is at it's worst when she starts losing her winter coat. She weighs about 55# and is on the smaller end for an adult. The big males get up to over 80# and are like 35 feet tall.