I'm honestly not sure how to grade this thing fairly. Shiba Inuko-San is a series of webisodes that clock in at just under the total length of two regular episodes of an anime. It's an attempt at a slice-of-life school comedy centred on a single outlandish element ("That character is actually a dog!"). As such, it throws any effort at having a concrete plot out the window before even trying, attempting instead to craft a single gag out of each episode. It fails miserably. If all you've got going for you is comedy, it had at least better be funny.
For two episodes of anime the size of the budget is above average. For a self contained production it's utterly abysmal. Character designs are bland, except for the titular Shiba Inuko; backgrounds are bland; honestly, there's nothing that stands out as excellent or as atrocious. Except for the animation itself. It's terrible.
The OP is some kind of nonsense pitter-patter trying to describe superficial characteristics of the title character backed by a couple of synths. There is no music to speak of during episodes. The seiyuu are alright, except for the title character - she's actually fairly atrocious. The sound effects are rarely present and nothing groundbreaking when they do appear.
They're cardboard cutouts posing for the beat of every joke. There's not a single relevant thing I could tell you about any of them after having watched the series. It's a flop.
It's a good way to waste 40 minutes if you really have nothing better to do with your time. I can't recommend it for any other reason, really.