OK, now that you're aware of how to check your dog's pulse, let's move on to temperature taking. The easiest way to do this is with an ear thermometer like the Pet-Temp Instant Ear Thermometer ($40). It measures the infrared heat waves coming from the ear drum. Pet-specific versions are best because they have a long probe that can fit deeply in the ear canal.
The other option is to use a rectal thermometer like this Vet-Temp Rapid Digital Thermometer for Pets ($15). Coat it with a water-based lubricant, insert about one inch, and wait for the finishing beep. While it's a cheaper option, if your pet dislikes this process, you will need to have someone else hold him and distract him while you measure the temperature. See the normal ranges for both cats and dogs when you read more