Last week we adopted a 6 month old rescue pup. He looks to be a pit mix. He was found hungry on the streets by a good samaritan a few weeks before we got him. He's doing very well with us, appears to be house trained, sleeps on a bed in the family room. We have two difficulties. 1) he does not want to use his crate and we need him to be crate trained (we are working on a gradual program to create positive crate associations for him). 2) He already seems to be VERY attached to me (mom in a family of four). when I leave he whines & tries to follow me. I left him home yesterday with my husband. We had him leashed & he chewed through the leash. Are there things we can do or avoid to help with this?