GEs
A Filter Flo is great for pets, but they have a few design quirks.
First: The big rubber boot that connects the outer tub to the transmission is prone to slipping after a few decades of use. It's really easy to fix. Just get 2 new oversize hose clamps, pull the agitator, the inner tub, install the new clamps, and put it back together again. Unfortunately, this is usually a huge leak, not a small one.
It could be a bad pump. My grandmother's GE FF had this happen. A pump replacement on a GE isn't a bad job and you can certainly do it yourself. The problem is that the pump is atop the motor and clutch. When the pump leaks, the clutch gets wet, which is bad for the bearings in it.
A clutch replacement is less pleasant than a pump replacement, but it is doable (I have done it). New clutches can be had on ebay for cheap. If the shaft through the clutch isn't worn, however, you can rebuild your old clutch even cheaper with new bearings and shoes (super easy once the top of the clutch is off). The worst part of replacing a whole clutch is the roll pin that connects the clutch to the motor shaft. That little sucker is a PAIN to pound out, but it can be done. Just remember to replace the relay or solenoid (I don't remember which) when you replace the clutch or else you WILL burn out the motor. I don't know why this is, but it is.
If it has a straight vane agitator, I would recommend replacing it with a ramp agitator. The ramp version is gentler and far more effective. Also, if you turn it on and it sounds like an ice crusher, whether in spin or in agitation, then the clutch bearings have failed. A GE FF should be pretty quiet and you should definitely be able to hear the water sloshing through the filter pan while agitating. Also, check that the gasket atop the outer tub is in good condition. IF not, water can slosh out, especially during spin.
Overall, a GE Filter Flo is a great machine and will provide many years of dependable and extremely effective service.
Cheers, and welcome to AW.org,
Dave