I just got a 4 month old dachshund puppy. How much should he be sleeping, eating, playing, etc?

The eating is easier to say. He should be getting 2 meals a day now, but you can cut back to one after 6 months. A cup each meal or what the bag says is a good starting point. With their backs, Dachshunds can't afford to be fat. Evaluate him as in this link, LongLiveYourDog.com - Life Span Study - Rate Your Dog (http://www.longliveyourdog.com/twoplus/RateYourDog.aspx) Adjust his food as needed. He may not need to lose weight, just replace fat with muscle and bone.

I let puppies play until they are tired. I them let them sleep until they wake up. He should still spend a good bit of time sleeping.

Check the sticky for more puppy info starting at https://www.askmehelpdesk.com/dogs/information-articles-our-dogs-expert-labman-53153.html#post251802