Trying to figure out how to keep our 5 month old Border Collie from chasing and biting everything in our fenced 5 acre yard. She's usually pretty relaxed indoors but when we take her in our backyard off-leash she turns crazy chasing and biting cars, cats, people, shovels and anything that moves. Normally, when she goes into crazy mode I would put her in time out, but when she's outside its nearly impossible to catch her. I've tried putting her on a really long leash but she just gets tangled on everything and even ended up ripping a tooth out somehow (not a permanent luckily). Another "game" she likes to play while outside is that she'll grab a tool or something you're using and play keep away and I know I'm not supposed to chase her when she does this but what can I do other than run away and try to get her to come to me? She does okay with coming when she called, and she's pretty relaxed when she's on a walk, I'm determined to fix this but she's just so hard to control without a leash I just don't know what to do.
