It is possible that this is the first public dog mod for GTA 3. I went through a lot of combinations and settled on this option, since it depends least on animation, which makes it possible to replace it with any pedestrian (it is advisable to use a model that does not participate in traffic, so as not to catch the dog driving a car).
There are 2 models of the dog in the archive: Small and large. (Installed big)
Have a nice game!