While substituting the name of a number with the name of an animal is a nice idea, there might be a problem. Names of numbers often start with the same letter, so there could be some confusion.
I would like to suggest the following:
0 1 2 3 4 5 6 7 8 9
pause do(low) re mi fa so la ti do(high) (yeah) - for pop/rock fans
pause do(low) re mi fa so la ti do(high) (yoh!) - for rap fans
pause do(low) re mi fa so la ti do(high) (yeha) - for country fans
The silliness could help you remember as well.