Dog Training Questions

Thomas asks…how do i train my 3 year old dog?He is only 3 and we had him since 3 months he is potty trained and knows how to sit,stay, etc..he is an american cocker spaniel and he has very bad behavior! he is not aggressive what so ever he'd only nibble on your fingers hes very sweet but he needs some obedience training! i cant afford a class so is there anything i can do at home? im up for ALL the work i taught him everything else myself.admin answers:Does he realize you are the master? When

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