I have a chihuahua I can I teach him to go to bed --- for him to go into his doggie bed /-- when I say go to bed
Maybe you could place him on his dog bed and say bed, then give him a reward. Repeat this maybe 7-10 times before saying bed and seeing if he goes on it on his own. If he doesn't, don't get mad or yell at him, just go back to step one. He'll get the hang of it eventually and be able to do it without being placed on the bed. Just remember to use positive reinforcement, rewards, petting him, saying good boy!, etc. I would suggest getting some kibble (doesn't have to be anything too fancy) to reward him.
Call your dog to his bed, once he's in it say bed. And reward him. Also you can hold him, put a treat on his bed and then walk away (make sure he sees the treat) then point to the bed, use the command bed and let him go. Once he goes to the bed to get the treat praise him. Also you can have him lay down in his bed and say stay, bed.. Always reward him when he does what you want him to.