1.We've all heard the "one year of a dog's life = seven years of a human's life" thing, but it's not entirely accurate. Really, dogs age quickly the first few years, then slow down after that:

2.This paws-itively fascinating chart gets even more in-depth, breaking down a dog's age in comparison to human years based on their size (oh, and they threw in a column for cats, too!):

3.Want to understand your dog's body language? This chart tells you exactly what they're feeling:

4.This chart takes things a littler further by spelling out what different doggie behaviors mean:

5.And this one explains what their barking sounds mean:

6.Heck — since we're all so keen to understand our dogs — here's a chart that teaches how we can communicate with them through hand signals:

7.This "Heimlich maneuver for dogs" chart could literally save your pup's life:

8.And this "pet CPR" chart could be a lifesaver, too:

9.This chart tells you what breeds are water dogs (water dogs are dogs hunters bred to excel at retrieving birds and other game from the water):

10.Ever wonder if something was OK to feed your dog? Well, thanks to this chart, now you'll know:

11.This chart is important to review if you're thinking of adopting a dog. Remember, adjusting to a new home takes time:

12.This chart runs down the different types of assistance dogs (plus one that's not real...can you spot it?):

13.This chart explains how you can safely cut your dog's nails:

14.And this one explains how you can clean their ears:

15.Lastly, taking your doggo on a roadtrip? This helpful chart details how you can keep 'em safe and happy:

HT: r/coolguides