Align two graphs of the weight development of my two puppy dogs (Rottweilers)

Hi all,

We are the happy daddy & mummy of two little Rottweiler puppies (next to two seniors, an 11 years old gentleman and an 11 years old Mrs ).

We are tracking the weight development of both of the little boys (one is now 7,5 months old, the other one is 6,5 months old). There is a difference both in when they came to our house (the 'oldest' one came quite early after being born, the second little boy stayed with his breeder a little longer before we found him and adopted him), as well as to when we did weigh them (sometimes every three days, then once a week, then, as today, only again after 12 days). I want to create meaningful graphs about it, which take care of the date differences. I would like to be able to compare the two little boys with eachother, as far as their weight development goes (so, ideally, I would like two lines in one graph).

Currently I have two tabs in which I keep the data. Unfortunately, my knowledge of Excel is way to basic to find out how to do what I want. Would anybody perhaps be willing to give me some tips? I'd be in your debt for that

I have attached my Excelsheet for review.

Thank you in advance for any help ,

Bye,