Community Tank Question- Dojo and Goldfish

[Dahz]

I was wondering if anyone has had similar issues to what I am seeing.  I have a community tank with the following:

Size- 150gal
Filtration- Sump (Seamless Sump with Reservoir)
Levels- 7.2-7.5, all balanced and cycled
Fish- 3 Comet Goldfish (10-14in), 4 Dojo Loaches (14-16in for 2, 4in for 2), 2 Bristlenose Plecos
Substrate- Sand, large rocks

I am seeing both my large and small Dojo loaches begin to mouth on my large Goldfish (potentially for slime coat?), the smaller ones in particular I caught today picking at the gills of the Goldfish.  The tank is long cycled, and I have started to run plants (quarantined and safe before use) in my sump to help with waste in the system.  I always have an algae issue (currently adjusting time of lighting and plants to help) but I haven't seen any other issues show up.

Has anyone else had this issue where their Dojo's have begun to potentially feed on their Goldfish?  Should I begin to setup a new home for them to separate?  For reference, the only time I have observed this behavior in the past was when they began to mouth on a sick Oranda, but no illness has been seen with the current Goldfish at all.

Thank you all for your help.

[Will Billy]

I have 2 golden dojo loaches in a 55 gal nano community tank and they get along great with neons, rasboras, guppies and even guppy fry. My guppies are breeding like crazy and the dojos dont bother the tiny babies that i know could easily fit in their mouth. Shrimp are another story, i have none in my tank and they are the reason why. My dojos do come up and peck at my hand while doing water changes. They are light pecks, almost like kisses lol. Do they seem aggressive in their behavior or are they lightly plucking at them? Do they have enough food? Most hobbyist focus on not overfeeding, in my experience you have to try very hard to overfeed a dojo loach. Mine are like greedy pigs. They come up and eat at the surface while i feed my other fish, and when most the food is gone they are constantly scouring my tank like living gravel vacs. Except for when they are sleeping they are non stop rummaging around for food. Other than that, sometimes some fish have different attitudes and personalities. I got a buddy with an oscar that is a down right cold blooded killer, and my brother has an oscar that is pretty friendly with fish less than half his size. Both are oscars, but are behaviorally complete opposites. 

[Dahz]

They generally just check them out, but lately its more "nibbling," especially the smaller golden dojo on the Goldfish's gills.  Was really digging in, but not biting from what I saw.  No chunks taken out so far.

This was also after feeding, so maybe they smelled leftovers.  Mine are also little piggies, they clear the tank when the Goldfish are done instantly.

My Dojos also give kisses, friendly little guys.

[Will Billy]

I feel like they should be good then, i would still keep a watchful eye just to be certain. Im pretty sure its food related. I have had instances where it wasnt quite aggressive behavior per say, but i have seen my dojos kinda push my cory doras out of the way getting to an algae wafer. Best way to a dojo loaches heart is through his stomach. Ive trained mine to eat bottom feeder pellets from my hand, and they let me and my daughter pet them from time to time. 

[Will Billy]

Here is a pic of one of my babies. Their names are Supercalifragilisticexpialidocious and Bob. 

[Dahz]

They come up for petting as well for me, though they get spooked easily.  Always have been easy, except I've had to remove anything resembling a hole from getting stuck MANY times.

I also used to have 2 cory colonies in there, but removed them due to size of the goldfish to prevent snacks.  50+ dual colony now living in a plant jungle enjoying their peaceful life.

I'll have to increase the food timing then, especially with them being much larger that everyone else.

Mine are Chip/Dale (small goldens that never grew), and Monty/Baloo.