async void OnItemSelected(object sender, SelectedItemChangedEventArgs args)
        {
            if (!(args.SelectedItem is Pet item))
            {
                return;
            }

            var info = await viewModel.GetPetInfo(item.Id);

            var medicals = (await viewModel.GetMedicals(item.Id)).ToList();

            await Navigation.PushAsync(new ItemDetailPage(new ItemDetailViewModel(info, medicals)));
        }