Gobblers reduce "durability" of berry bushes each time they hide in it.

This is intended.

The type of fertilizer used matters.

Poop = 5 harvest, rot and rotten egg= 3 harvests, Guano= 7 or 8 (I forget which number is correct).

Each time a globber jump into a berry bush it consume 1 harvest count. Natural spawned berry bush has unlimited counts of harvests hence is not affected by globber. Harvest your berry bush during the day if you find this issue annoying.

1 hour ago, Mday said:

The type of fertilizer used matters.

Poop = 5 harvest, rot and rotten egg= 3 harvests, Guano= 7 or 8 (I forget which number is correct).

This is not at all true, and I don't understand why you stated those first two numbers so confidently. The max amount of harvests for a berry bush before needing fertilizer is 4-5 (it's random, depending on the bush), regardless of fertilizer used. The only place where fertilizer quality matters is farms.

10 hours ago, Sunset Skye said:

This is not at all true, and I don't understand why you stated those first two numbers so confidently. The max amount of harvests for a berry bush before needing fertilizer is 4-5 (it's random, depending on the bush), regardless of fertilizer used. The only place where fertilizer quality matters is farms.

Opps. I just tested it on both DS and DST and you are right.

I remember these numbers from way back when guano was introduced to the game. Did some tests back then to see how different they are. Which is why I have always save the rots for grass tuft(use to be 13 grass harvest per rot, now is 20, same as poop) and poop for berry bush. Things must have changed over the years.