You have had some good advice here.Marbles sounds very like my Basset Rupert.
I would definately look at his food.Give him no additives at all.
Rupert changed dramatically when we stopped them.Even his treats are additive free,he only has Jerky,Tripe sticks ans fish skin treats.
When Rupert was at his worst he wore a house line all the time and if he did something bad he was told leave and removed from the room via the line and given timeout.You must remember to praise him wnen he is good as well though.
I would definately look at his food.Give him no additives at all.
Rupert changed dramatically when we stopped them.Even his treats are additive free,he only has Jerky,Tripe sticks ans fish skin treats.
When Rupert was at his worst he wore a house line all the time and if he did something bad he was told leave and removed from the room via the line and given timeout.You must remember to praise him wnen he is good as well though.