There is no Distance Limit to feed Berry?

I gave berries to my pokemon after I traveled 900 km far

I was able to feed pokemon from France while I was in Spain. So if there is a limit, it's a huge distance XD

I gave berries to Pokemon in Greece after I had returned to NL.

I originally heard that the more close you were to a gym, the more efficient the berries would be. Not sure if this rumour was true or that Niantic being Niantic and isn't able to programme correctly in one attempt.

Theres no limit no. But feeding berries from outside the gym range will give less motivation back then normal.

Golden razz still give 100% motivation though