Yes, it’s a twitter appliance for your dog.
Yes, you must replace the battery. Why wasn’t it designed it use a USB recharging method? Are they unaware that twitter users tend to be pretty savvy? And why so big? Given that it is using a local wireless channel, it could be much smaller.
Yes, you can complain about repeating tweets from your dog and then buy a forthcoming puppytweet update pack.
Yes, it is safe for your dog. It says so right in the FAQ.
Yes, it comes in an array of colors: blue and pink.
Yes, they made three 10-second videos to gloss over the particulars of installation.