This enemy has high damage and a quick attack rate, it only has 30 HP, but only takes one damage per hit like all other Metal enemies. Your meatshields should be able to take them down by themselves, but it becomes deadly in groups, especially when buffed.
Using Hurricat can be very useful against this enemy. Not only does it have a chance to deal criticals, it also does a lot of rapid attacks to wear down Metal Doge's health. Alternatively, stacked Catasauruses and Cameraman Cats can both perform a similar feat to Hurricat, albeit not as effective as him.