i have a чихуахуа, чиуауа its old we estimated well its mean how do u train it????

Показать them a treat and say them to do somthing but they dont know what do do so Ты train them for exsample say Ты wanted it to roll over Ты do it first and it may do it and when it does a trick always give it a treat if it wont keep Показ it and soon it will do it