
How old is he?
If he has finished his course of injections (about 14 weeks old) he will be needing several 5 minute walks a day, building up to adult exercise of a minimum of 2 walks each lasting at least half an hour with some free running in each,
every dayIf he gets less that this he will be completely hyper. Collies were bred to cope with being exercised all day, often going over 50 miles, herding sheep. Only being walked at weekends is
not enough for any breed, especially not a collie-type.