Give it time.
I just started a 1.3 about 4 months ago.
Got my first litter from a 3 mommas about 3 weeks ago.
27 pups total.
All this extra work for my little male Champaign Mojave holdback that refuses f/t and wouldn't eat for 6 months....
After I get him up to about 5 or 600 grams the fight to switch will start again.