This sounds ridiculous but here goes...
My partner and I got a puppy last year. We agreed beforehand that he would take care of food and meals and I take care of everything else. However, my partner keeps putting off going to the butchers, leaves it too late and tries to get me to go instead. It's the only thing he has to do for this dog and I feel like I can't rely on him. I've told him how I feel and nothing changes. I'm surprised he's being this irresponsible and it concerns me. :'(