In the Easter Patch, pets were updated so that:

- Maximum pet level increased to 200. Attribute bonus for a pet: level 100 +0.5%, level 150 +0.75%, level 200 +1%
However, attribute bonuses are only given when integer values for each habitat are reached (due to rounding).

My suggestion would be to allow for a smaller bonus in line with the above to allow breaking through the rounding faster:

level 50 +0.25%

It doesn't do much (same as with any given pet at that level), however it may allow a cumulative attribute increase to happen much earlier.

In addition, it will probably make programmers life easier since you can now mathematically derive the bonus (just pet level / 200).