1.) Right, so the speed of the dissolving for consumption has quite a few factors. It is gonna depend on how big the little critter is, and how much Slimey is in or on the substance it wants to eat, and the materials it is constructed from. If the material is fairly dense, it's going to take awhile for Slimey to eat it, but it gives more mass due to being a denser and thicker material. Like if some kid tosses their homework into Slimey, it will be devoured and dissolved instantly, but it will grant little in the way of mass.

Right now, Slimey would be focused on like tricycles instead of cars. (Being the size of a toddler tends to reduce the amount of cars you can eat) And humans right now are not on Blrbl's menu. Instead it'd be focusing on stray and lost house-pets. Mostly cats and other smaller critters.


2.) Gunk Sludge minions are essentially smaller/weaker versions of the original that have more adverse affects to ambient temperature and stuff than the original.  How long it takes to spawn them depends on amount, size of the creature being spawned (obviously can never be bigger than him) etc. Right now, since it isn't used to creating copies of itself as much, let's say it takes twenty to thirty minutes of being still, to produce some gunk. If it actually goes about creating it. Because it is animal like in its nature and doesn't have much in the way of a mind it probably won't use it just yet.