I tried an Artificer w/o Augmented Summoning - and it didn't take long to realize it's just too good a feat to pass up. The dog is much more survivable with it then without.
If you decide to not take Augmented Summoning for any reason, like a multiclass build or whatnot, I would highly recommend taking the Uncaring Master enhancement. Because when your pet dies, the trauma of that death hits your Artificer with a loss of both HPs and SPs. Uncaring Master reduces that loss to zero - and without Augmented Summoning, your pet will be dying a lot more often.