How is Izzy doing today...I am hoping and praying that he/she starts gaining weight. I do believe that little Phoenix is getting jelouse or maybe possible regressing. Human children tend to do this too when a younger sibling is getting a lot of attention. I am thinking that Phoenix wants to be like Izzy and be a BABY again, and thinks he needs formula. lol
My middle son did this when we brought home his baby brother, all of a sudden he wanted to drink out of a bottle again too. It is just a phase
Have a good day.
Maria