150lbs and 4yo??? How did this happen?

So I got o pick up my daughters at day care today (first day of the baby at day care- a trial run i guess you can call it) and i sat down to speak to the sitter for a little bit. I think I just felt so good to have a day to myself after so many months I didn't want to think about how soon I would be back home to feeding/diapering/coloring/reading/cooking, etc all at the same time (practically). Anyway, so I sit to talk to her about the children (mine are 2 of five that she currently has- one being her grand-daughter) and she is telling me about the 4 month old that she has and how much she is currently eating. Now, i try not to judge parents as i see many people passing judgment on me and i want to SCREAM, but let me explain.... she is four months old and since she was 2 MONTHS OLD she has been eating solids (well puree but you get the point). I thought this was unheard of but her mom claims the doctor recommended it. (I want to ask her the Dr's name so I make sure to never go anywhere near him/her). She is currently what i would consider a very overweight child. I don't know lbs per say but let me just say that it is not a far stretch to say it is more comfortable to pick up my 2 year old for a 1/2 hr than to pick her up. Mind you my daughter is on the skinny side because of her height, but really this girl is 4 months old. She eats 6 oz of milk and then proceeds to eat a plate of veggies AND a plate of fruit..... are u kidding me???? And her mom is not on alert? Obesity is rampid in this country and it is a health concern- does she not see this? or does she not care? That's what i want to know! So the sitter has told her this is really not a good idea and has tried to feed her less just to see if she can make her diet a little more normal- she cries until she is fed her usual surplus of food. So, now to my 150lb 4 yr old- yes people I said 150LBS!!!!!!!!! It is the 4 month old's cousin and at age 4 he was 150lbs. He has been hospitalized mutliple times for heart problems and he has a sister that is 2 years younger and following in the same footsteps...... is it a stretch to say this is abuse??? Apparently he and his sister can finish (and have many a times) an 8-slice pie of pizza by themselves! I mean everyone loves a chubby little baby to squeeze their cheeks, but isn't this going a bit too far??? This is adult weight! ugh! I don't even know what to say....i'm appalled.