The past 3 weeks Rosi been doing that too, she is outside alot with me on retractable leash, she has been eating grass then later throwing up later, i dont think she is eating grass because of an upset tummy, i think it is the other way around, she is eating grass then it upsets her tummy, she has been wormed just to be shure 3 weeks ago but that didn help, yesterday i kept her indoors more and she didn throw up. Got vet app. today and have her checked just in case.. the only thing changed is that i switched her to adult food and he being outside more...