[Tiberius]

So I recently adopted a Yorkie I've had him for almost two weeks now and besides the first day he's been pooping outside during his morning walk and at night during his nightly walk. Now he's being fed 1/4 of a cup of dry food twice a day since he needs to lose weight. He has missed a few nightly poops but always goes in the morning. He usually goes in about 20-30 min but today we were out for an hour and nothing. Is this normal? I've never had a Yorkie before so any advice would help!