Or your city could provide you with better services now that they have five extra millions each year. Better roads would allow you to move your cattle faster or to export your products better. So you lose some, but win some also.
Or maybe you will not need it, now that the new local restaurants opened want to buy your meat to feed the tourists. More competence and lower expenses to put your product in the market will allow you to sell your meat at a better price.
Tourists will want to buy souvenirs also. Maybe in stores owned by members of your family.
Your city will attract researchers. Science has a curious proven effect; each single researcher position creates tens of auxiliary jobs around to sustain their research.
In resume, the young adults in your city will have a range of new opportunities to settle, work and start a live project in their own city if they would desire so.
Or you can forget all of this and keep your cow
Be honest, do you really liked so much that stupid cow?