My advice is not to worry.
he is prob just learning a new trick to push his food out.
Have you tried any other finger food?
banana, toast,carrot,turnip,chips, fish,basically anything which is soft and he can pick up and eat.
My dd did not really eat anything for the first 12 months and I got demented and really worried about her.
Once she started 1 it all changed and now she can feed herself life is abit easier (she is nearly 2)
I think the secret is NOT to worry about what they eat.
Relax, chill and do not hover over him as her eats otherwise he will pick up on your tension.
Believe me they will eat when they are hungry.
Some days my dd has nothing to eat, and other days she eats lke a horse.
Please do not worry about this, he will get all his nutrition from his milk at this stage.
HTH
x